The 812 Area Code (or Area Code 812) is located in the state of IN. Area Code 812 is one of the 269 3-digit telephone area codes in the USA. It covers roughly 1.8 million unique phone numbers and 6.19 million individuals near the city of Nashville
On March 7, 2015 area code 930 was put into service as an overlay of area code 812. Effective February 7, 2015 ten digit dialing in area codes 812 and 930 became mandatory. For more details view area code 930. Ten digit dialing (area code + seven digit number) is necessary in the 812/930 overlay because two different homes in the same geographic area can have the same seven digit phone number but each would have a different area code.